Agree with you, up to a point, AGS, but these particular people do NOT add to the economy of a country...

Car washes & nail bars are hardly vital to the countries economy, as most, or all of the CASH (and it IS cash) probably goes strait abroad to support families, and NO tax or NI paid.....

So yes, we probably need a level of immigration, but in jobs that contribute to the host country, be it the UK, or USA.